Study the power curve of a 510-peak-horsepower Roushcharged Raptor ... For example, does a 4.2-liter 250 outboard make more midrange torque than a 4.2-liter 225? And if not, maybe it would be smarter ...

Mercury now believes that displacement, not supercharging, proves superior for making effective outboard power. The performance we experienced aboard a variety of boats during a press preview verified ...